Dividing of warp stop motion blades from a series of blades



June 20, 1950 H. MEIER 2,512,165 DIVIDING 0F WARP STOP MOTION BLADES YFROM A SERIES OF BLADES Filed April" 13. 1945 2 Sheets-Sheet 1 H. MEIERDIVIDING OF WARP STOP MOTION BLADES June 20, 1950 FROM A SERIES OFBLADES -2 Sheets-Sheet 2 tu ar mow M39 omm Omn. .25

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Filed April 13. 1345 N omne, om

INVENTOR jfsilu'ich Jteien ATTORNEYS Patented June 20, 1950 DIVIDING OFWARP STOP MOTION BLADES FROM A SERIES OF BLADES Heinrich Meier, Uster,Switzerland. assignor to Zellweger A. G., Apparate-und Maschinenfabriken Uster, Uster, Switzerland Application April 13, 1945, SerialNo..588,l51 In Switzerland April 21, 1944 7 Claims.

This invention relates to the dividing or separation of a warp stopmotion blade from a series of blades.

In order to divide or separate a blade from a series of warp stop motionblades, constructions including relatively small permanent magnets orsuction heads are known for separating the foremost blade in a row.Devices of this type how-- ever have the drawback that a single blade isnot divided and separated from the series with sufiicient reliability.vFor example, it frequently happens that blades which may be greasy orwhich adhere to one another for any other reason are carried along withthe foremost blade when such blade is separated- Also in constructionswherein suction action is utilized onl the blades which present to thesuction head a plane and relatively large engagement area may be used sothat a relatively expensive construction is required for tie-- velopingthe requisite vacuum. It is an object of the invention to provide aconstruction avoiding the above disadvantages.

Furthermore in using dividing devices having permanent magnets of slightstrength there is the risk that the blades upon being separated willleave such magnets and when stronger magnets are used the blades beingseparated may carry along with them one or more of the immediatelyfollowing blades in the series. This latter contingency is particularlytrue if the blades are very thin. Furthermore it may also happen thatthe blades which follow the blade to be separated or divided off mayfirst be removed and then drop off or trail behind so that the distancebetween the separated blade and the following blade is reduced to suchan extent that the drawing-in of a warp thread is rendered mostdifiicult. It is a further object to avoid the above disadvantages.

A further object of the invention is to provide a construction whereinthe dividing or separating member cooperates with a knife in such a waythat the knife edge engages with the blades in the series immediatelybehind the blade separated. 7

A still further object is to provide a construction wherein a magnet 01'sufficient strength may be used to ensure the separation of one bladefrom. the series without fall. If therefore two or more blades areliable to be removed because of the excessive attractive force of themagnet the superfluous blades are prevented from being carried alongwith the dividing'or separating member by the knife. The inventiontherefore is particularly well suited for removing blades from a singleseries of blades as well as from any desired number of series.

A still further object of the invention is to provide means whereby thedistance betweenthedividing member and the. knife may bevaried so as tobe adjusted in accordance with the thickness of a blade. i

A still further object of the invention is to provide a constructionwhich is not only suitable for dividing devices employing magnets but,also for any other blade removing means such as, for example, suctionheads. y

With the above and other objects inview which will become apparent fromthe detailed description below, the invention is illustrated in thedrawings by way of example only, in which:

Fig. l is a front view of the dividing or separat-- ing device withparts in cross-section;

Fig. 2 is a side elevational view of the construetion shown in Fig. 1; r

Fig. 3 is a top plan view of the construction shown in Fig. l; a

Fig. 4 is a side view of a detail of a control de- .uce;

Fig. 5 is a side elevational view showing a bladev held in the drawingin position by a magnet;

Fig. 6 is asimilar view showing the magnet'in a terminal position; and

Fig. 7 is a diagram showing operation during a complete cycle. In thepresent instance four parallel carrier bars I are shown supported by theframe of the machine in fixed position and fiat warp stop motion blades2 are mounted on the bars by the slots: provided therein. The dividingor separation of the foremost blade of each series of blades is elfectedby a permanent magnet 3 associated with each row of blades. Each magnetis secured to a supporting body 4 with the magnet poles thereof locatedat the left and right hand side respectively of the associated carrierbar I. In the position where the blade is gripped the poles of eachmagnet extend, as shown in Fig. 2, below the upper edge of the carrierbar I.

All of the supporting bodies 4 are connected with one another by astirrup 6 to which each body is individually secured and the stirrup 6is rotatably mounted upon a shaft 5 which is supported in a mountingshield M. With each carrier bar I and therefore with each series ofblades there is provided a two-armed lever 1 which is secured by a bolt8 to a mounting 9 which is rotatably mounted on the shaft 5 so that thelover: I may oscillate in two planes at right angles to one another. Thearm of each lever 1 extending towards the blades 2 is provided with aknife In which terminates, as shown in Fig. l, in an edge 10 which maybe projected laterally to cooperate with the respective carrier bar I. Atension spring H engages with the other" arm of each lever l and thetensile force of the spring H comprises a longitudinal component and acomponent transversely of the carrier bar I.

A cylindrical bolt 1 is provided on the upper end of the lever 1 forengaging the circumference of a pusher or plunger I2 having a conicalsurface portion l2 and a disc I2". The four plungers I2 are axiallydisplaceably mounted in a common U-shaped carrier i3 and are each urgedby a spring [4 against a control drum l5 for common control by means ofthe four earns 15 on the control drum I 5 which are spaced from oneanother by 90. The control drum I5 is driven as shown in Fig.4 by aratchetwheel l6 operated by a pawl 11 which is mounted on a rocker l8which in turn is rotatably mounted on ashaft i9. g

"'A crank through a connecting rod 2| transmits a reciprocating movementto the'rocker i8 which is pivoted to the rod 2|. A connecting rod 22 isalso pivotally connected to the crank and the rod 22 is pivotallyconnected by a bolt 23 to a link 25 which in turn is connected with thesupporting body 4 which is adjacent the mounting shield 24. A controlplate 28, urged by'a tension spring 21, is mounted upon an axle 25rotatably mounted on the mounting shield 24. A pin 29 secured to thelink 25 engages in a cam groove 28' provided in the control plate 28.

On the rotatable axle 26 four ejecting levers 32 are fixed each of whichis associated with a magnet 3 and consequently also with the respectivecarrier bar I and is arranged for swinging movement between the twomagnet poles concerned.

The operation of the dividing device is as follows:

The crank 20 is rotated by means of a driving motor (not shown). whichcan be cut in andcut out by means of a floor contact or may be connectedwith a power-take-oif, as shown in the patent to Moore, No. 1,259,546.The rotation in clockwise direction starts from the position shown inFig. 5. The function of the apparatus is, however, easier to explain, ifone starts with the position shown in Fig. 2,' at which time the crank20 is in rotation.

By the action of the intermittently fed rotatable crank 20 the foursupporting bodies 4 together with the associated magnets 3 through theconnecting rod 22 and the link 25 have a swinging movement impartedthereto. By this means the bodies are moved during a complete revolutionof the crank through 360 from the bladegripping position as shown inFig. 2 into the drawing-in position shown in Fig. 5; into the terminalposition shown in Fig. 6 and then back again into the blade-grippingposition shown in Fig. 2. The device is temporarily halted by theoperator (Fig. 5) while a thread is threaded through a blade 2. I

If the dividing device is used without drawingin the thread through theblades as for dividing the blades for the purpose of donning the bladeson the warp threads the drive for the dividing device may operatecontinuously without any intermission.

The pawl I! carried by the rocker I8 is swung by the connecting rod 2 Iwhich is reciprocated by the crank 20 so that the ratchet wheel IS onthe control drum I5 is rotated each time through 90 for one completerevolution of the crank. In this way one of the four cams i5 on thecontrol drum i5 moves a plunger l2 associated with such cam to shiftsuch plunger axially against the action of its associated spring 14. Theassociated lever l is then pivoted about its bolt 8 due to thecooperation of the conical surface portion i2 of the plunger [2 and theknife edge 10 of the associated knife H! is moved from the range oftravel of the blades so that the knife as shown in Fig. 1 at the lefthand side is clear of the series a of the blades 2. The knives, whichpertain to the series a1, a2 and as remain, however, in position so thatthey prevent any removal of the plates in such series by the associatedmagnets.

During the movement of the plunger I2 and the knife carrier lever 1 thefour supporting bodies 4 as well as the magnets 3 associated therewithwill have been rotated by the action of the stirrup 5 into the bladegripping position as shown in Fig. 2. The poles of the magnets 3 locatedat both sides of a carrier bar I then contact the leading blade of therespective series in this case the series a to move it upon subsequentmovement of the supporting bodies 4 from the position shown in Fig. 2 tothe drawing-in position shown in Fig. 5. The knives associated with theother series prevent, as

- stated above, the foremost plates from being dragged along by themagnet.

During this movement of the supporting body 4 the cylindrical bolt 1' ofthe lever 7 slides along a generatrix of the conical surface portion 12'of 1 the associated plunger 12 under the influence of itself in thespace between the foremost and the following blade thereby restrainingth remaining blades 2 of series a and preventing such blades from beingcarried along by th magnets 3. When the cylindrical bolt I of the leverI strikes the end face of the disc l2" facing the conical surfaceportion i2 of the plunger l2 the move ment of the knif carrier lever lis stopped while the supporting bodies 4 continue in their movement tothe drawing-in position of Fig. 5.

In this way any blades 2 that may adhere to the blade 2 which is beingdivided off are reliably retained and a sufiicient spacing between suchblade being divided off and the series of blad s is secured so as toprovide a more convenient drawing-in of a thread through the blade 2divided off. The blade 2 which has thus been divided off maintains anoblique position which can be secured by correspondingly obliquelyarranged bearing surfaces on the poles of the magnets 3.

The four ejecting levers 30 which are disposed on the axle 26, so thatthey rotate uniformly,-

follow the movement of the supporting bodies '4' and of the magnets 3,so that that ejector which belongs to that pair of magnets which hasseparated a blade contacts this blade and forces it, as shown in Fig. 5,against the inclined surfaces of the two magn ts. In this manner aneventual falling-off of the blades which are separated and hang on themagnets 3 is prevented. The movement of the ejecting levers 3B iseffected by means of the cam grOOVe 28' in the control plate 28. Thiscontrol plate 28 is fastened on the axle 26, and is driven by the pin 29on the link 25, which is secured to the outermost supporting body 4. Thcam groove is so developed that the ejecting levers follow thesupporting bodies and reach the 8 pole surfaces in the position shown inF181- described above. Under the influence of the. spring 21, theejecting levers 30: have. thetendau ios ency to pass between the twomagnets pertaining to one carrier bar and swing further toward the left(Figs. 5 and 61. I

When the. thread is drawn-in, the operator sets the crank again inmotion, whereby the magnets: continue towards the left, until theyarrive in the.- flnal position shown in. Fig. 6, while the. ejectinglevers 3!! follow them. The ejector lever,lwhich has engaged a blade,shoves; the same during-its:

progress into the position shown in Fig. edownwardly on the poles of themagnets. At the last moment the. ejector strikes the blade under theinfluence of the. spring 21 so that it is moved a.

little further along the bar 1. When the crank is rotated further, theconnecting rod 2.2: moves the magnets back again into. the position.shown iii-Fig.2.

While the supporting bodies 4 move from the position shown in Fig. 6 tothe position shown. in

Fig. 2 the ejecting levers 30- alsopivot back into; their initialposition as shown in Fig.v 2. Inthe:

course of the next followingrevolution of; the crank 20 the ratchetwheel t6. of the controldrum- .[5 is rotated 90 by the. pawl I! andanother cam [5 will strike. the plunger (2 associated therewithwhereupon the cycle of operations begins anew The cooperative movementof the various-ele-- ments is diagrammaticall illustrated inthe. diagramof Fig. 7 which gives a complet cycle of 360'-ofthe crank 20.. Thevarious elements are indicated along the ordinate while the time ofmovement with relation to the movement of the crank is shown on theabscissa. The stationary period for the crank 20 during whichthe-drawing-in operation takes place is indicated by dotted lines.

The start of the movements at 0 degrees corresponds with the positionshown in Figs. 1, 2, and 3; The crank rotates from this position inclockwise direction through an angle of more than 90 degrees duringwhich the magnets move away from the series of blades, and the magnets"of the series a take along a blade, while the other three series areretained by the knives. As can b seen from the diagram for the knifpertaining to series a, it is swung in back of the blade when themagnets have first moved a slight portion of their way. The insertion ofthe knife starts at approximately 20 degrees and is finished at about 50degrees. The movement of the ejectors follows the movement of th magnetsso that the ejector pertaining to the series a starts at about 95degrees to press on the blade lying on the inclined surfaces of themagnet.

The apparatus reaches the drawing-in position at about 105 degrees andis maintained in this position as long as th operator desires. When therotation of the crank is resumed, the crank now travels without stoppingthrough the positions from 105 degrees to 360 degrees, and again from 0degrees to 105 degrees.

During this period the magnets move towards th left as seen in Fig. 2until the crank has passedrsmdegrees. Duringthistimethe electorsmoveal'ong also and shove th blade downwardly along-theinclined surfacesof the magnets. Upon.-

conti'nued rotation of the crank, the magnets re turn towards the rightand atv 360 degrees they are back again. at theposition shown in Fig. 2.

- The control drum- I5 is stationary at 0 degrees, at the start of therotation of the crank, since the connecting rod 2| moves downwardlbetween" 0 degrees and about 125 degrees. After 125 degreesv are passed,the rod 2| moves upwardly and actuates the pawl H causing the ratchetwheel l-Bi to: rotate degrees. The movement of the" pawl is finished atabout 305 degrees. The control drum t5- and also thecams [5 thereforeare stationary from 305-. degrees to 360 degrees. and from 0 degrees.to, 125. degrees of the rotation of thecrank; The same holds for theplungers 2, the: movement ofwhich is caused by the cams [5".

It is thought that the invention and. its advantages will be understoodfrom the foregoing description. and it. is apparent that various changesmay be made in the form, construction and arrangement of thepartswithout departing from. the: spirit and scope of the invention orsacrificing: its. material advantages, the form hereinbefore describedand illustrated in the drawings being merely av preferred embodimentthereof.

I claim:

i. In a: devicezfor' dividing. warp stop motion blades from a series ofblades, the combination with a row of warp stop motion blades consti-ftilting the seriesv of blades, 2. support extending in the direction ofsaid blade row for sustaining.

said rowfor the individual blades to be removable in said direction,dividing meansv for exerting attractive removing power on the foremostblade with the thicknessof said blades, said knife edge" cooperatingwith said dividing means by inter'-' engagement with said series ofblades at said distance behind said foremost blade in said, series.

2; In av device for dividing warp stop motion blades from various seriesof blades in the course of successive working cycles, the combinationwith each individual row of blades constituting said various series, asupport extendin in the direction of said blade row for sustaining saidrow for the individual blades to be removable in said direction,dividing means for exerting attractive removing power on the foremostblade in said row, of a knife for each said row having a knife edge,displaceable plungers for controlling said knives, a roll forcontrolling said plungers, for said knife edge to cooperate with therespective said dividing means by interengagement of said knife edgewith the associated series of blades directly behind said foremost bladein each series of blades from which said foremost blade is to be dividedoff, and means for shifting said knife edge in each row from which saidforemost blade is not to be divided off between said dividin means andsaid foremost blade.

3. In a device for dividin Warp stop motion blades from a series ofblades, the combination with a row of warp stop motion bladesconstituting the series of blades, of a support extending in thedirection of said blade row for sustaining said row for the individualblades to be removed in said direction, dividing means for exertingattractive removing power on the foremost blade in saidrow, a knifehaving aknife edgecooperating; with said dividing means and acamoperated plungercooperating with said knife for; engagin said knifeedge with said series directly behind said foremost blade in said seriesto be divided off shortly after said foremost blade has been removed bysaid dividin means from said series.

4. In a device for dividing Warp stop motion blades from a series ofblades, the combination with a row of warp stop motion bladesconstituting a series of blades, of a support extending in the directionof said blade row for sustaining said row for the individual blades tobe removable in said direction, permanent magnetic means for attractingthe foremost blade in said row, a knife having a knifeedge forcooperation with said magnetic means and means cooperating with saidknife for engaging said knife edge with said series directly behind saidforemost blade in said series to be divided off immediately after aslight movement of said foremost blade from said series by said magneticmeans.

5. In a device for dividin warp stop motion blades from a series ofblades, the combination with a row of warp stop motion blades consti-'tuting the series of blades, of a support extending in the direction ofsaid blade row for sustaining said row for the individual blades to beremovable in said direction, dividing means for exerting attractiveremoving power on the foremost blade in said row, means for moving saiddividing means together with said attracted foremost blade away fromsaid row, a knife having a knife edge cooperating with said dividingmeans by interengagement of said knife edge with said series directlybehind said foremost blade in said series blade row, and means forsetting said knife at rest with said knife edge insaid position ofinterengagement, while said dividing means moves said foremost bladeaway from said row by actuation of said moving means.

6. In a device for dividing a warp stop motion blade from a row ofblades in a series of rows of blades the combination comprising supportsextending in the direction of each blade row for sustaining said row forthe individual blades to be removable in said direction, dividing means8; fcrs'each" rowfor exerting attractive removing poweron the foremostblade in each row, means for moving said dividing means together withsaid attracted-foremost blade away from said row, a knifehaving a knifeedge for each row for cooperatin with said dividing means, means foroperating the knife in the row from which a blade'iis to be divided toretain the blades behind the foremost blade after a slight movement ofsaidwforemost'blade by said dividing means and means for operating theknives in-the other rows to retain all the blades therein and preventaction of saidv dividing means on the blades in said last named rows;

-7. In a device for dividing warp stopvmotlon blades from a series ofblades, the combination with a row of warp stop motion bladesconstituting the series of blades, of a support extending in thedirection of said blade row for sustaining said row for the individualblades to be removed in said direction; dividing means for exertingattractive removing power on the foremost blade in said row, a knifehaving a knife edge cooperating withsaid dividing means and a camoperated mechanism cooperatin with said knife'for removing-said knifefrom in front of the foremost blade insaid seriesand inserting saidknife directly-behind said foremost blade in said series shortly aftersaid foremost blade has been slightly removed by said'dividing meansfrom said series.

HEINRICHMEIER.

, REFERENCES CITED The following references are of record in the file ofthis patent:'- I

. nmtrnp sTA'rEs PATENTS ,Germ-any Mar. 16, 1933

